INNER RING
Specifications for Metric and Inch Ball Bearings (all tolerances shown are in .0001 inch)
| Bore Diameter d
mm Over |
Bore Diameter d
mm Incl. |
Bore Diameter d
Inches Over |
Bore Diameter d
Inches Incl. |
Bore Tolerance Limits
dm Low |
Bore Tolerance Limits
dm High |
Bore Tolerance Limits
dmin |
Bore Tolerance Limits
dmax |
Raceway Radial Runout |
|---|---|---|---|---|---|---|---|---|
| 0 | 10 | 0 | 0.3937 | -3 | +0 | -4 | +1 | 2 |
| 10 | 18 | 0.3937 | 0.7087 | -3 | +0 | -4 | +1 | 3 |
| 18 | 30 | 0.7087 | 1.1811 | -3 | +0 | -4 | +1 | 3 |
| 30 | 50 | 1.1811 | 1.9685 | -4 | +0 | -5 | +2 | 4 |
| 50 | 80 | 1.9685 | 3.1496 | -4 | +0 | -6 | +2 | 4 |
| 80 | 120 | 3.1496 | 4.7244 | -6 | +0 | -8 | +2 | 5 |
| 120 | 150 | 4.7244 | 7.0866 | -7 | +0 | -9 | +3 | 7 |
| 150 | 180 | 4.7244 | 7.0866 | -7 | +0 | -9 | +3 | 7 |
| 180 | 250 | 7.0866 | 9.8425 | -8 | +0 | -11 | +4 | 8 |
OUTER RING
Specifications for Metric and Inch Ball Bearings (all tolerances shown are in .0001 inch)
| Bore Diameter d
mm Over |
Bore Diameter d
mm Incl. |
Bore Diameter d
Inches Over |
Bore Diameter d
Inches Incl. |
Outside Diameter Tolerance Limits
Dm High |
Outside Diameter Tolerance Limits
Dm Low |
Outside Diameter Tolerance Limits
Open Bearings Dmax |
Outside Diameter Tolerance Limits
Open Bearings Dmin |
Outside Diameter Tolerance Limits
Shielded/Sealed Bearings Dmax |
Outside Diameter Tolerance Limits
Shielded/Sealed Bearings Dmin |
Radial Runout |
|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 18 | 0 | 0.7078 | +0 | -3 | +1 | -4 | -2 | -5 | 4 |
| 18 | 30 | 0.7078 | 1.1811 | +0 | -3 | +1 | -4 | +2 | -5 | 4 |
| 30 | 50 | 1.1811 | 1.9685 | +0 | -3 | +2 | -5 | +4 | -7 | 4 |
| 50 | 80 | 1.9685 | 3.1496 | +0 | -4 | +2 | -6 | +4 | -8 | 5 |
| 80 | 120 | 3.1496 | 4.7244 | +0 | -5 | +3 | -7 | +6 | -10 | 7 |
| 120 | 150 | 4.7244 | 5.9055 | +0 | -6 | +3 | -8 | +6 | -11 | 8 |
| 150 | 180 | 5.9055 | 7.0866 | +0 | -7 | +3 | -9 | +6 | -12 | 9 |
| 180 | 250 | 7.0866 | 9.8425 | +0 | -8 | +4 | -11 | +8 | -15 | 10 |
| 250 | 315 | 9.8425 | 12.4015 | +0 | -10 | +4 | -12 | +8 | -16 | 12 |
WIDTH TOLERANCES
Specifications for Metric and Inch Ball Bearings (all tolerances shown are in .0001 inch)
Bearings Other Than Duplex Width of Individual Inner or Outer Ring
| Inner Ring Bore
mm Over |
Inner Ring Bore
mm Incl. |
Inner Ring Bore
Inches Over |
Inner Ring Bore
Inches Incl. |
Width Tolerance Limits | Width Tolerance Limits |
|---|---|---|---|---|---|
| 0 | 10 | 0 | 7.0866 | +0 | -50 |
| 180 | 315 | 7.0866 | 12.4015 | +0 | -100 |
| — | — | — | — | — | — |
Duplex Bearings Total Width of Inner or Outer Ring*
| Inner Ring Bore
mm Over |
Inner Ring Bore
mm Incl. |
Inner Ring Bore
Inches Over |
Inner Ring Bore
Inches Incl. |
Width Tolerance Limits | Width Tolerance Limits |
|---|---|---|---|---|---|
| 0 | 80 | 0 | 3.1496 | +0 | -200 |
| 80 | 180 | 3.1496 | 7.0866 | +0 | -300 |
| 180 | 315 | 7.0866 | 12.4015 | +0 | -400 |
* If other than a pair of bearings is involved, the tolerances are in proportion to the number of bearings.